21. Titanium dioxide pigment is the single greatest use of titanium worldwide. 22. This yields a yellow green product sometimes used as a pigment . 23. The following examples illustrate the shifting nature of historic pigment names: 24. The cast terracotta figure bears traces of its original white pigment . 25. The red pigment vermilion is mostly obtained by reduction from cinnabar. 26. Intestinal anaerobic bacteria transform haemoglobin into sulfhemoglobin and other colored pigments . 27. The rhodopsin pigment must be regenerated for further phototransduction to occur. 28. It produces mostly titanium dioxide pigments and nitrogen and phosphorus fertilizers. 29. The three receptors are dominated by three rhodopsin-like pigments . 30. The pigment is still made today by essentially the same process.
